1 #ifndef __SOUND_CORE_H 2 #define __SOUND_CORE_H 3 4 /* 5 * Main header file for the ALSA driver 6 * Copyright (c) 1994-2001 by Jaroslav Kysela <perex@perex.cz> 7 * 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 */ 24 25 #include <linux/device.h> 26 #include <linux/sched.h> /* wake_up() */ 27 #include <linux/mutex.h> /* struct mutex */ 28 #include <linux/rwsem.h> /* struct rw_semaphore */ 29 #include <linux/pm.h> /* pm_message_t */ 30 #include <linux/stringify.h> 31 #include <linux/printk.h> 32 33 /* number of supported soundcards */ 34 #ifdef CONFIG_SND_DYNAMIC_MINORS 35 #define SNDRV_CARDS CONFIG_SND_MAX_CARDS 36 #else 37 #define SNDRV_CARDS 8 /* don't change - minor numbers */ 38 #endif 39 40 #define CONFIG_SND_MAJOR 116 /* standard configuration */ 41 42 /* forward declarations */ 43 struct pci_dev; 44 struct module; 45 struct completion; 46 47 /* device allocation stuff */ 48 49 /* type of the object used in snd_device_*() 50 * this also defines the calling order 51 */ 52 enum snd_device_type { 53 SNDRV_DEV_LOWLEVEL, 54 SNDRV_DEV_CONTROL, 55 SNDRV_DEV_INFO, 56 SNDRV_DEV_BUS, 57 SNDRV_DEV_CODEC, 58 SNDRV_DEV_PCM, 59 SNDRV_DEV_COMPRESS, 60 SNDRV_DEV_RAWMIDI, 61 SNDRV_DEV_TIMER, 62 SNDRV_DEV_SEQUENCER, 63 SNDRV_DEV_HWDEP, 64 SNDRV_DEV_JACK, 65 }; 66 67 enum snd_device_state { 68 SNDRV_DEV_BUILD, 69 SNDRV_DEV_REGISTERED, 70 SNDRV_DEV_DISCONNECTED, 71 }; 72 73 struct snd_device; 74 75 struct snd_device_ops { 76 int (*dev_free)(struct snd_device *dev); 77 int (*dev_register)(struct snd_device *dev); 78 int (*dev_disconnect)(struct snd_device *dev); 79 }; 80 81 struct snd_device { 82 struct list_head list; /* list of registered devices */ 83 struct snd_card *card; /* card which holds this device */ 84 enum snd_device_state state; /* state of the device */ 85 enum snd_device_type type; /* device type */ 86 void *device_data; /* device structure */ 87 struct snd_device_ops *ops; /* operations */ 88 }; 89 90 #define snd_device(n) list_entry(n, struct snd_device, list) 91 92 /* main structure for soundcard */ 93 94 struct snd_card { 95 int number; /* number of soundcard (index to 96 snd_cards) */ 97 98 char id[16]; /* id string of this card */ 99 char driver[16]; /* driver name */ 100 char shortname[32]; /* short name of this soundcard */ 101 char longname[80]; /* name of this soundcard */ 102 char mixername[80]; /* mixer name */ 103 char components[128]; /* card components delimited with 104 space */ 105 struct module *module; /* top-level module */ 106 107 void *private_data; /* private data for soundcard */ 108 void (*private_free) (struct snd_card *card); /* callback for freeing of 109 private data */ 110 struct list_head devices; /* devices */ 111 112 unsigned int last_numid; /* last used numeric ID */ 113 struct rw_semaphore controls_rwsem; /* controls list lock */ 114 rwlock_t ctl_files_rwlock; /* ctl_files list lock */ 115 int controls_count; /* count of all controls */ 116 int user_ctl_count; /* count of all user controls */ 117 struct list_head controls; /* all controls for this card */ 118 struct list_head ctl_files; /* active control files */ 119 struct mutex user_ctl_lock; /* protects user controls against 120 concurrent access */ 121 122 struct snd_info_entry *proc_root; /* root for soundcard specific files */ 123 struct snd_info_entry *proc_id; /* the card id */ 124 struct proc_dir_entry *proc_root_link; /* number link to real id */ 125 126 struct list_head files_list; /* all files associated to this card */ 127 struct snd_shutdown_f_ops *s_f_ops; /* file operations in the shutdown 128 state */ 129 spinlock_t files_lock; /* lock the files for this card */ 130 int shutdown; /* this card is going down */ 131 struct completion *release_completion; 132 struct device *dev; /* device assigned to this card */ 133 struct device card_dev; /* cardX object for sysfs */ 134 bool registered; /* card_dev is registered? */ 135 136 #ifdef CONFIG_PM 137 unsigned int power_state; /* power state */ 138 struct mutex power_lock; /* power lock */ 139 wait_queue_head_t power_sleep; 140 #endif 141 142 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE) 143 struct snd_mixer_oss *mixer_oss; 144 int mixer_oss_change_count; 145 #endif 146 }; 147 148 #define dev_to_snd_card(p) container_of(p, struct snd_card, card_dev) 149 150 #ifdef CONFIG_PM 151 static inline void snd_power_lock(struct snd_card *card) 152 { 153 mutex_lock(&card->power_lock); 154 } 155 156 static inline void snd_power_unlock(struct snd_card *card) 157 { 158 mutex_unlock(&card->power_lock); 159 } 160 161 static inline unsigned int snd_power_get_state(struct snd_card *card) 162 { 163 return card->power_state; 164 } 165 166 static inline void snd_power_change_state(struct snd_card *card, unsigned int state) 167 { 168 card->power_state = state; 169 wake_up(&card->power_sleep); 170 } 171 172 /* init.c */ 173 int snd_power_wait(struct snd_card *card, unsigned int power_state); 174 175 #else /* ! CONFIG_PM */ 176 177 #define snd_power_lock(card) do { (void)(card); } while (0) 178 #define snd_power_unlock(card) do { (void)(card); } while (0) 179 static inline int snd_power_wait(struct snd_card *card, unsigned int state) { return 0; } 180 #define snd_power_get_state(card) ({ (void)(card); SNDRV_CTL_POWER_D0; }) 181 #define snd_power_change_state(card, state) do { (void)(card); } while (0) 182 183 #endif /* CONFIG_PM */ 184 185 struct snd_minor { 186 int type; /* SNDRV_DEVICE_TYPE_XXX */ 187 int card; /* card number */ 188 int device; /* device number */ 189 const struct file_operations *f_ops; /* file operations */ 190 void *private_data; /* private data for f_ops->open */ 191 struct device *dev; /* device for sysfs */ 192 struct snd_card *card_ptr; /* assigned card instance */ 193 }; 194 195 /* return a device pointer linked to each sound device as a parent */ 196 static inline struct device *snd_card_get_device_link(struct snd_card *card) 197 { 198 return card ? &card->card_dev : NULL; 199 } 200 201 /* sound.c */ 202 203 extern int snd_major; 204 extern int snd_ecards_limit; 205 extern struct class *sound_class; 206 207 void snd_request_card(int card); 208 209 int snd_register_device_for_dev(int type, struct snd_card *card, 210 int dev, 211 const struct file_operations *f_ops, 212 void *private_data, 213 const char *name, 214 struct device *device); 215 216 /** 217 * snd_register_device - Register the ALSA device file for the card 218 * @type: the device type, SNDRV_DEVICE_TYPE_XXX 219 * @card: the card instance 220 * @dev: the device index 221 * @f_ops: the file operations 222 * @private_data: user pointer for f_ops->open() 223 * @name: the device file name 224 * 225 * Registers an ALSA device file for the given card. 226 * The operators have to be set in reg parameter. 227 * 228 * This function uses the card's device pointer to link to the 229 * correct &struct device. 230 * 231 * Return: Zero if successful, or a negative error code on failure. 232 */ 233 static inline int snd_register_device(int type, struct snd_card *card, int dev, 234 const struct file_operations *f_ops, 235 void *private_data, 236 const char *name) 237 { 238 return snd_register_device_for_dev(type, card, dev, f_ops, 239 private_data, name, 240 snd_card_get_device_link(card)); 241 } 242 243 int snd_unregister_device(int type, struct snd_card *card, int dev); 244 void *snd_lookup_minor_data(unsigned int minor, int type); 245 struct device *snd_get_device(int type, struct snd_card *card, int dev); 246 247 #ifdef CONFIG_SND_OSSEMUL 248 int snd_register_oss_device(int type, struct snd_card *card, int dev, 249 const struct file_operations *f_ops, void *private_data); 250 int snd_unregister_oss_device(int type, struct snd_card *card, int dev); 251 void *snd_lookup_oss_minor_data(unsigned int minor, int type); 252 #endif 253 254 int snd_minor_info_init(void); 255 int snd_minor_info_done(void); 256 257 /* sound_oss.c */ 258 259 #ifdef CONFIG_SND_OSSEMUL 260 int snd_minor_info_oss_init(void); 261 int snd_minor_info_oss_done(void); 262 #else 263 static inline int snd_minor_info_oss_init(void) { return 0; } 264 static inline int snd_minor_info_oss_done(void) { return 0; } 265 #endif 266 267 /* memory.c */ 268 269 int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count); 270 int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count); 271 272 /* init.c */ 273 274 extern struct snd_card *snd_cards[SNDRV_CARDS]; 275 int snd_card_locked(int card); 276 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE) 277 #define SND_MIXER_OSS_NOTIFY_REGISTER 0 278 #define SND_MIXER_OSS_NOTIFY_DISCONNECT 1 279 #define SND_MIXER_OSS_NOTIFY_FREE 2 280 extern int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int cmd); 281 #endif 282 283 int snd_card_new(struct device *parent, int idx, const char *xid, 284 struct module *module, int extra_size, 285 struct snd_card **card_ret); 286 287 int snd_card_disconnect(struct snd_card *card); 288 int snd_card_free(struct snd_card *card); 289 int snd_card_free_when_closed(struct snd_card *card); 290 void snd_card_set_id(struct snd_card *card, const char *id); 291 int snd_card_register(struct snd_card *card); 292 int snd_card_info_init(void); 293 int snd_card_info_done(void); 294 int snd_component_add(struct snd_card *card, const char *component); 295 int snd_card_file_add(struct snd_card *card, struct file *file); 296 int snd_card_file_remove(struct snd_card *card, struct file *file); 297 #define snd_card_unref(card) put_device(&(card)->card_dev) 298 299 #define snd_card_set_dev(card, devptr) ((card)->dev = (devptr)) 300 301 /* device.c */ 302 303 int snd_device_new(struct snd_card *card, enum snd_device_type type, 304 void *device_data, struct snd_device_ops *ops); 305 int snd_device_register(struct snd_card *card, void *device_data); 306 int snd_device_register_all(struct snd_card *card); 307 int snd_device_disconnect_all(struct snd_card *card); 308 void snd_device_free(struct snd_card *card, void *device_data); 309 void snd_device_free_all(struct snd_card *card); 310 311 /* isadma.c */ 312 313 #ifdef CONFIG_ISA_DMA_API 314 #define DMA_MODE_NO_ENABLE 0x0100 315 316 void snd_dma_program(unsigned long dma, unsigned long addr, unsigned int size, unsigned short mode); 317 void snd_dma_disable(unsigned long dma); 318 unsigned int snd_dma_pointer(unsigned long dma, unsigned int size); 319 #endif 320 321 /* misc.c */ 322 struct resource; 323 void release_and_free_resource(struct resource *res); 324 325 /* --- */ 326 327 /* sound printk debug levels */ 328 enum { 329 SND_PR_ALWAYS, 330 SND_PR_DEBUG, 331 SND_PR_VERBOSE, 332 }; 333 334 #if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK) 335 __printf(4, 5) 336 void __snd_printk(unsigned int level, const char *file, int line, 337 const char *format, ...); 338 #else 339 #define __snd_printk(level, file, line, format, args...) \ 340 printk(format, ##args) 341 #endif 342 343 /** 344 * snd_printk - printk wrapper 345 * @fmt: format string 346 * 347 * Works like printk() but prints the file and the line of the caller 348 * when configured with CONFIG_SND_VERBOSE_PRINTK. 349 */ 350 #define snd_printk(fmt, args...) \ 351 __snd_printk(0, __FILE__, __LINE__, fmt, ##args) 352 353 #ifdef CONFIG_SND_DEBUG 354 /** 355 * snd_printd - debug printk 356 * @fmt: format string 357 * 358 * Works like snd_printk() for debugging purposes. 359 * Ignored when CONFIG_SND_DEBUG is not set. 360 */ 361 #define snd_printd(fmt, args...) \ 362 __snd_printk(1, __FILE__, __LINE__, fmt, ##args) 363 #define _snd_printd(level, fmt, args...) \ 364 __snd_printk(level, __FILE__, __LINE__, fmt, ##args) 365 366 /** 367 * snd_BUG - give a BUG warning message and stack trace 368 * 369 * Calls WARN() if CONFIG_SND_DEBUG is set. 370 * Ignored when CONFIG_SND_DEBUG is not set. 371 */ 372 #define snd_BUG() WARN(1, "BUG?\n") 373 374 /** 375 * Suppress high rates of output when CONFIG_SND_DEBUG is enabled. 376 */ 377 #define snd_printd_ratelimit() printk_ratelimit() 378 379 /** 380 * snd_BUG_ON - debugging check macro 381 * @cond: condition to evaluate 382 * 383 * Has the same behavior as WARN_ON when CONFIG_SND_DEBUG is set, 384 * otherwise just evaluates the conditional and returns the value. 385 */ 386 #define snd_BUG_ON(cond) WARN_ON((cond)) 387 388 #else /* !CONFIG_SND_DEBUG */ 389 390 __printf(1, 2) 391 static inline void snd_printd(const char *format, ...) {} 392 __printf(2, 3) 393 static inline void _snd_printd(int level, const char *format, ...) {} 394 395 #define snd_BUG() do { } while (0) 396 397 #define snd_BUG_ON(condition) ({ \ 398 int __ret_warn_on = !!(condition); \ 399 unlikely(__ret_warn_on); \ 400 }) 401 402 static inline bool snd_printd_ratelimit(void) { return false; } 403 404 #endif /* CONFIG_SND_DEBUG */ 405 406 #ifdef CONFIG_SND_DEBUG_VERBOSE 407 /** 408 * snd_printdd - debug printk 409 * @format: format string 410 * 411 * Works like snd_printk() for debugging purposes. 412 * Ignored when CONFIG_SND_DEBUG_VERBOSE is not set. 413 */ 414 #define snd_printdd(format, args...) \ 415 __snd_printk(2, __FILE__, __LINE__, format, ##args) 416 #else 417 __printf(1, 2) 418 static inline void snd_printdd(const char *format, ...) {} 419 #endif 420 421 422 #define SNDRV_OSS_VERSION ((3<<16)|(8<<8)|(1<<4)|(0)) /* 3.8.1a */ 423 424 /* for easier backward-porting */ 425 #if defined(CONFIG_GAMEPORT) || defined(CONFIG_GAMEPORT_MODULE) 426 #define gameport_set_dev_parent(gp,xdev) ((gp)->dev.parent = (xdev)) 427 #define gameport_set_port_data(gp,r) ((gp)->port_data = (r)) 428 #define gameport_get_port_data(gp) (gp)->port_data 429 #endif 430 431 /* PCI quirk list helper */ 432 struct snd_pci_quirk { 433 unsigned short subvendor; /* PCI subvendor ID */ 434 unsigned short subdevice; /* PCI subdevice ID */ 435 unsigned short subdevice_mask; /* bitmask to match */ 436 int value; /* value */ 437 #ifdef CONFIG_SND_DEBUG_VERBOSE 438 const char *name; /* name of the device (optional) */ 439 #endif 440 }; 441 442 #define _SND_PCI_QUIRK_ID_MASK(vend, mask, dev) \ 443 .subvendor = (vend), .subdevice = (dev), .subdevice_mask = (mask) 444 #define _SND_PCI_QUIRK_ID(vend, dev) \ 445 _SND_PCI_QUIRK_ID_MASK(vend, 0xffff, dev) 446 #define SND_PCI_QUIRK_ID(vend,dev) {_SND_PCI_QUIRK_ID(vend, dev)} 447 #ifdef CONFIG_SND_DEBUG_VERBOSE 448 #define SND_PCI_QUIRK(vend,dev,xname,val) \ 449 {_SND_PCI_QUIRK_ID(vend, dev), .value = (val), .name = (xname)} 450 #define SND_PCI_QUIRK_VENDOR(vend, xname, val) \ 451 {_SND_PCI_QUIRK_ID_MASK(vend, 0, 0), .value = (val), .name = (xname)} 452 #define SND_PCI_QUIRK_MASK(vend, mask, dev, xname, val) \ 453 {_SND_PCI_QUIRK_ID_MASK(vend, mask, dev), \ 454 .value = (val), .name = (xname)} 455 #define snd_pci_quirk_name(q) ((q)->name) 456 #else 457 #define SND_PCI_QUIRK(vend,dev,xname,val) \ 458 {_SND_PCI_QUIRK_ID(vend, dev), .value = (val)} 459 #define SND_PCI_QUIRK_MASK(vend, mask, dev, xname, val) \ 460 {_SND_PCI_QUIRK_ID_MASK(vend, mask, dev), .value = (val)} 461 #define SND_PCI_QUIRK_VENDOR(vend, xname, val) \ 462 {_SND_PCI_QUIRK_ID_MASK(vend, 0, 0), .value = (val)} 463 #define snd_pci_quirk_name(q) "" 464 #endif 465 466 #ifdef CONFIG_PCI 467 const struct snd_pci_quirk * 468 snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list); 469 470 const struct snd_pci_quirk * 471 snd_pci_quirk_lookup_id(u16 vendor, u16 device, 472 const struct snd_pci_quirk *list); 473 #else 474 static inline const struct snd_pci_quirk * 475 snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list) 476 { 477 return NULL; 478 } 479 480 static inline const struct snd_pci_quirk * 481 snd_pci_quirk_lookup_id(u16 vendor, u16 device, 482 const struct snd_pci_quirk *list) 483 { 484 return NULL; 485 } 486 #endif 487 488 #endif /* __SOUND_CORE_H */ 489